Looks like an alternative to waiting for #3754, which appears stale

Just like #3754, this shouldn't need preferences in the client but could be default behavior. Although to be fair, I believe this behavior would be better suited for the server. We already ask it for the (subtitle/audio) streams to use and it already knows we played a previous episode of the same series with a specific subtitle/audio stream. If the change was made on the server it would result in a better experience across all clients.

I added preferences:

1. To let the user choose
2. Because this part of the code is a little tricky to me (plus there are no tests), so I'm not completely sure I'm not breaking anything (although I have tested it manually).

If you prefer, I can remove preferences and let it as default behavior.
I agree this should be come from the server. However, a lot of issues has been raised (including this one open by myself, which, btw, has been tagged as "Wrong repo") and there is no solution yet (in web it seems to partially work). So, until it's solved server side, I guess client should be able to handle it

What do you think @nielsvanvelzen?

(If a non-server approach is used) this looks a lot better than what I had in #3754 . I struggled getting playback to actually play, but this looks like it doesn't have the issue I did. I do think I could get behind the server approach for this though. Makes more sense to have the server calculate this in one place the consuming clients could use

I added preferences:

1. To let the user choose
2. Because this part of the code is a little tricky to me (plus there are no tests), so I'm not completely sure I'm not breaking anything (although I have tested it manually).

If you prefer, I can remove preferences and let it as default behavior. I agree this should be come from the server. However, a lot of issues has been raised (including this one open by myself, which, btw, has been tagged as "Wrong repo") and there is no solution yet (in web it seems to partially work). So, until it's solved server side, I guess client should be able to handle it

What do you think @nielsvanvelzen?

Yeah default behavior would be better, no one would watch an episode in 1 language and another episode in another language, once set, it should stick by default. And I do agree that this is better implemented server side (per user), but if this is the only solution right now, I'd take it as long as this change is reverted once/if a server side solution is implemented later.

Set as default options. Also created jellyfin/jellyfin#13794 to use it once it's solved